Be heroes in an army of construction.

One painful duty fulfilled makes the next plainer and easier.

A good education is a stepping-stone to wealth.

As the eagle was killed by the arrow winged with his own feather, so the hand of the world is wounded by its own skill.

Now I feel as if I should succeed in doing something in mathematics, although I cannot see why it is so very important. . . The knowledge doesn't make life any sweeter or happier, does it?

The human being is born with an incurable capacity for making the best of things.

When one door of hapiness closes, another opens.